388 



INDEX. 



Slipper limpet, 345 

 Slugs, 317 

 Snails, 311 

 Snail, apple, 344 



„ cellar, 312 



,, garden, 313 



„ land, 311 



„ pear, 332 

 ,, Roman, 313 



„ pond, 240, 307 

 SolaridSE, 325 

 Solaster, 159 

 Solemyia, 283 

 Solen, 282 

 Solenidse, 282 

 Solenophoruo, 202 

 Spadella, 214 

 SpatangidiE, 173 

 Spatanginie, 174 

 Spatangocystis, 174 

 Spatangus, 174 

 Specialized types, xvii 

 Spectre candles, 373 

 Spicules, sponge, 64 

 Sperinatopliores, 366 

 Spermatozoan, ix 

 Sphaeridia, 162 

 Sphairium, 275 

 Sphaerodina, 20 

 Sphseroplirya, 47 

 Sphaerozoiim, 12 

 Spicula amoris, 305 

 Spicules, 54 

 Spindle, xlv 

 Spiriferidse, 247 

 Spinalis, 358 

 Spirillina, 18 

 Spirochonia, 45 

 Spirorbis, 227 

 Spirostomum, 27, 41 

 Spirula, 373 

 Spirulidaj, 373 

 Spondylus, 262 

 Sponges, 44 

 Sponge, bath, 51, 64 



,, commercial, 64 



„ crumb-of-bread, 66 



,, cup, 64 



„ dead-man's finger, 65 



, , hard-head, 64 



,, Iresh-water, 67 



,, glass, 60 



„ horse, 64 



,, spicules, 51 



,, toilet, 64 

 wool, 64 



,, Zimmocca, 64 

 SponginjE, 64 

 Spongomonas, 36 ' 

 Squid, 360, 374, 376 

 Squid, giant, 377 

 " Staggers," 201 

 Star-fishes, 152 

 Statoblasts, 67, 238 

 Stauroteuthis, 369 

 St. Cuthbert's beads, 139 

 Stellerida, 147 

 Stentor, 28 

 Stephanomia, 102 

 Stephanops, 205 

 Sternapsis, 227 

 Stichopus, 182 

 Stichotricha, 46 

 Stinging cells, 74 

 Stoastoraa, 324 

 Stomatoca, 83 

 Strepomatinse, 342 

 Streptaxis, 310 

 Streptoneura, 294 319 

 Strigilla, 279 



Strobila, 96 

 Strombidse, 349 

 Strombs, 350 

 Strombus, 350 

 Strougylidse, 211 

 Strongylocentrotus, 170 

 Stylets, 29 

 Stylifer, 342 

 Styliola, 358 

 Stylommatophora, 309 

 Stylonichia, 45 

 Suberites, 6() 

 Succinea, 317 

 Succinidse, 317 

 Suckauhock, 277 

 Suctoria, 47 

 Sun-animalcules, 13 

 Sun-dial shell, 326 

 Sun-flsh, 89 

 Sun-star, 100 

 Supply system, 53 

 Surf-clam, 278 

 Sutures, 287 

 Sycandra, 55 

 Syoones, 62 

 Sycotypus, 131 

 Syllidaj, 229 

 Synapta, 180 

 Synaptidse, 180 

 Synaptula, 180 

 Syngamus, 211 

 Synthetic type, xviii 



Syzygy, 144 



Tactile sense, xxx 

 Taenia, 198 

 Tsenioglossa, 338 

 Taonius, 375 

 Tapes, 277 

 Tape-worms, 198 

 Tebenophorinse, 318 

 Tebenophorus, 318 

 Tectibrancliiata, 301 

 Teeth, xxi 

 Telescopium, 348 

 Tellina, 279 

 Tellinldae, 279 

 Tentaculata, 111 

 Tentaculilera, 47 

 Terebella, 225 

 Terebellum, 350 

 Terebra, 337 

 Terebratulidse, 247 

 Terebratulina, 247 

 Teredinse, 284 

 Teredo, 284 

 Tergipes, 298 

 TererbridK), 337 

 Testaoella, 310 

 Testacellidse, 310 

 Testioardina, 247 

 Tethya, 68 

 Tethys, 300 

 Tetrabranchiata, 367 

 Tetractinellinae, 68 

 Tetrastemraa, 215 

 TeuthidiB, 375 

 Textularia, 16, 21 

 Thalassema, 231 

 Thalassicolla, 7 

 Thalassolampe, 9 

 Thamnocnidia, 81 

 Theoata, 87 

 Thecidium, 247 

 Thecosomata, 357 

 Thimble-fish, 93 

 Thorny-oyster, 262 

 Thracia, 282 

 Thunder-bolts, 373 

 Thurioola, 45 



Thyone, 181 

 Thyonidium, 181 

 Thysanozoon, 189 

 Thysanoteuthis, 375 

 Tiedemannia, 359 

 Tintinus, 42 

 Tissues, ix, xiii 

 Tube-worm, 225 

 Toilette sponge, 64 

 Tomopteris, 230 

 Tongue, 288 

 Tooth shells, 291 

 Top-shells, 322 

 Tomatella, 302 

 TornatellidiE, 301 

 Torquatella, 43 

 Toxiglossa, 336 

 Trachelocera, 3(i, 40 

 Tracheloceridae, 40 

 Trachelomonas, 37 

 Traehydermon, 394 

 Trachymedusae, 88 

 Trachynema, 88 

 Trematoda, 191 

 Trichaster, 152 

 Trichina, 210 

 Trichinosis, 210 

 Triohocephalus, 365 

 Trichocysts, 27, 40 

 Trichodina, 43 

 Triohonella, 63 

 Trichonymphidae, 41 

 Trichotrachelidse, 210 

 Triohocephalus, 211 

 Tridaona, 272 

 Tridacnidae, 272 

 Triloris, 348 

 Trigonia, 209 

 TrigonidEe, 269 

 Ti-iploblastic, xi 

 Tritia, 333 

 Tritonidae, 352 

 Tritonium, 353 

 Trivia, 349 

 Trochosphere, 251 

 Trochostoma, 179 

 TroGhozoon, 186 

 Trochammina, 21 

 Trochidae, 322 

 Trochus, 322 



Trumpet animalcules, 42 

 Truncatella, 340 

 Trochoceras, 368 

 Tryohonympha, 41 

 Trypanosoma, 31 

 Trypanosomata, 31 

 Tuba, (iO 

 Tubicolae, 225 

 Tubifex, 223 

 Tubificidffi, 223 

 Tubipora, 121, 123 

 Tubiporidae, 123 

 Tubularia, 81 

 Tubulipora, 240 

 Tubuliporidse, 240 

 Tulotoma, 340 

 Tun shells, 352 

 Turbellaria, 188 

 Turbo, 322 

 TurritellidSE, 343 

 Turritopsis, 88 

 Tylenohus, 208 

 Tyrian purple, 330, 334 

 Types, xvii 



Umbellularia, 124 

 Umbellulidae, 124 

 Umbilicus, 287 

 Umbrella, 303 

 Unoini, 29 



